Heat-regulator.



E. H. WHITE.

HEAT REGULATOR.

APPLICATION FILED IAN.10. 191e.'

Patented July 9, 1918.

2 SHEETS-SHEET l.

E. H. WHITE.

HEAT REGULATOR.

APPLICATION FILED 1AN.10| I9T6.

L27L85. Patented July 9,1918,

2 SHEETS-SHEET 2.

WiL/7e3 595 /hre/f/ for;

EVERETT H. WHITE, 0F ST. PAUL, MINNESOTA.

HEAT-REGULATOR.

Specication ofLetters Patent.

Patented July 9, 1918.

Application filed January 10, 1916. Serial No. 71,350.

To all lwhom z't may concern.'

Be it known that I, EVERETT H. WHiTE, a citizen of the United States,residin at St. Paul, in the county of Ramsey and tatev of Minnesota,have invented certain new and useful Improvements in Heat-Regulators, ofwhich the following is a specification.

My invention relates tov heat regulators and has for its object toprovide an improved device for making and breaking electric circuitsgoverned by the temperature of theroom in which the device is set,

the vmaking -and breaking of said circuits operating damper controllingmechanism (not shown)by which the furnace is regulated. In carrying outmy invention I employ an expansible chamber or set of chambers filledwith ether gas as the thermostatic element,'sinceI have discovered'thatthe use of ether gas in such an expansible chamber gives a maximum ofsensitiveness and force of movement of the circuit-controlling member.The contact making member or pointer is pivotally mounted on the supportyfor the thermostatic member, which in turn is pivotally mounted, sothat the entire thermostatic member may be oscillated relatively to thecontact members. In this manner the thermostatic member is adjusted Asoas to operate to close the circuitsv at any desired temperature.

It is a further object of my invention to provide the ether gascontainers in f the form of one or more hollow disk-shaped bodies whichare held in planes parallel to the plane of movement of the Contact arm.The expansionmovement of these gas containers is a plied to levermechanism which translates the motion into a plane perpendicular totheline of movement of the point .of application of force from `.thethermostats, this lever` mechanism `greatly simplitying such movement. ii rllhe full objects and advantages of my invention will appear inconnection with the detailed description thereof and` are particularlypointed out in the claims. f In the drawings, illustratin theapplicationof my invention in one orm,-

Figure 1 is a front elevational view oitf my improved thermostat withthe'cover removed and some of the parts shown in dotted lines. Fig. 2 isa'longitudinal side sectional view of the same taken substantiallythrough the center. Fig. 3 is a view similar to'Fg. 2 showing .a derentform et case with part of the same cut away. Fig. 4 is a plan view ofthe same device shown in Fig. 3 with a guard attached to the case. Fig.5 is a front elevational view of a part of the device shown in Fig. 4.

My invention comprises a metal back 10 having turned-up edges 11 and 12to which are attached an ornamental casing or cover 13. The back 10 isof heavier metal than the cover and serves to support the operatingparts. APivotally attached to t-he back 10 by a screw 14 is a casting 15having a bearing shoulder 16 resting upon the surface of back 10. Thisshoulder allows the casting 15 to oscillate without excess play 'and soholds the parts attached thereto in the proper relation to the otherparts of the thermostat. Issuing from the central portion of casting 15is a lug 17 which termi- ,nate's in two vbosses 18 and 19. Boss 18 isacted upon by heat to'I cause said members to spread apart in the usualmanner. At the upper portion of casting 15 are a pair of parallelsupports'or lugs 24 and 25 extending out beyond the thermost-atic member22,

between which'are pivoted at 28 an L-shaped lever having legs 26 and 27.Leg 26 is arranged to be engaged by a peg 23 secured to the member 22,and leg 27 is free to os cillate betvveen'the 'supports 24 and 25 as themembers 21 and 22 spread and come together. Pivotally mounted in thecasting 15 and in a screw 29 inserted in the boss 19 is a spindle 30carrying a pointer 31 and a lever32 at right angles to said pointer fastthereon. Any movement of the members 21 and 22 is communicated throughlevers 26 and 27 by means of a connecting link 33 'to the arm 32, thusactuating the pointer 31. As the arm 32 is relatively short the motionof the thermostatic device is multiplied so that the pointer 31 makes asubstantial sweep for only a few degrees change in temperature. t willbe noted that the lower end of link 33 is pivoted to arm 32, while theupper end terminates in a reduced portion 34 which loosely passesthrough 'the leg 27 and is so engaged by it. This expedient is used onlyfor the facility in assembling '5 2, whih um is itself .pivoeed toeleback the device.. lEointel' '31 is'A returl'iedto the.`

positionv corresponding -to the temperature by a spring l35 coiled.about va peg 36 fast in casting/15 and having one end secured in saidcasting at 37.and.the\ othei' end 38 engaging'pointer A31 through a link39. Adjustment of-the position 'of pointer 31 may be made by 'rotatingmembers 21 and' 22 .to screwthe stud 20 in its bos`s18,an'd

the same maybe heldin position after' it has been set by a set-screw 73screwed into the support17 and engaging said stud.I

' Pointer 31'f7serves as a movable contact wmember which engages anumber of fixed members 40 and 41, ofxwhich member 41- is*- vthe-moreextensive, and several intermediate contact members best shown inFig. 1. The,

latter contact members comprise. two' end x-"fflnembers 42v and 43.-vMembers 40 and 41 are-provided with'ears 44and .45 which areclampedtogether by` screws 46v land 47, thusholdlng all the conta/ctmembers together 1 and insulated from .each other. The ccmbined contactmembers th'us formed are ar- 4 rangedin the arc ofa circle whose centeris the pivot 14 and are supported fromscrew 46 by a single angularbracket 48 attached to the back 10. The whole can thus more easily beadjusted and alined. Pointer 3 1, as best shown .in Fig. 2, is formedwith a contact head 49 which engages the fixed contact members .as thetemperature changes and successively .completes the various circuits Ythrough them. 'All of the contact members I and the pa1t49l of pointer3.1 may be seen from without the device through a window 72in'the case13'. 17

contact members. The means for oscillating It willnow be comprehended`that if the casting 15 is rotatedupon the4 pivot 14 the wholethermostatic device Vincluding 'the pointer` will be rotated relativelyt0 the' fixed and locking the s amewill now be described.

' Castingl is provided `at'its lower extremity witha peg slidable in a'slot 51 in a lever 10 by a screw 53 passing through -a slot 54 insaidlever. .Lever-52 extends out through the bottom'of the case 13 andis bentforward on itself and terminates ina pointed head 5:5 engageable:in a notched segnient 56 secured to -theback `1 0 through'ears 5 7.l A

'dia' onally-positioned spring 58"l secured Ato 1 lthe l ack 10 andthellevel' 52te11ds t0 draw the saine tothe right'and upward into engagevment with the -segment 56e*Y In order to set 55 andthecasting15fshifted.

the device lfor dierent room temperatures the level-'52 is' pulled.downward by the head "israel-s tion 63 from a raised portion 64 of' thelever 52, so that as the lever 59 iskmoved downwardthe lever 52 is 'alsomoved downward,iandwhen .the catch 63 is near the centevi' ofoscillation of -lever .52 the sam'ecom'es' out beyond the head of screw5 3 and the pointed headv-is` released from the segment .56 and lever 52drawn to the right by. v

catch A63 is located near screw 53' prevents Vslidingfolf the catch 63uponfthe feg 61 and hence lfacilitates the `movement of the lever 52.[Lever 59 is given its downward motion by'the ala-rm winding stem 65 ofan ordinary alarm .clock 66, removably attached to the' -thespring 58;The release of lever V52 4whenl case 13 'by a snapl lever 73, as.clearly indicated 'in the drawing.. A Alever 67, similar to l lever`52;having ahead 68 engageable in the segment 56 and a groove 69throughwhich the; screw 53 passes, is used as a vstop fol-.pro-

curing thel desired vro'om temperature vwhen thel levei'52 -isautomatically released by thev clock 66. Lever..67 can be set alongsegment 56 byhand andis held set by a `spring 7 0 connecting it with theback 1 0.

The contactmemlbers, as well as the pointer, are connected to a seriesof binding posts 72 by leads`71 running along the inside of the back 1U.AThe thermostat may be connected .byfmeans of the'binding posts 72` withany 'suitable form of operating device which Amay be employed toregulate the source of heat.

' In some cases it will be found that it may beV desirable to-have thethermostatic members 21 and 22 in the open,and to this endrll modifythecasing 1 3 to appear asshownfin Fig.- 3. vThe thermostatic' members 21and A 22 and all the actuating' mechanism within the casing may be thesamev as that of the form shownv in Figs. 1 and 2. The case 75 in thisform is made with a perfectly .hat

face having an 'aperture 76 ih the same foi' allowing member 22 toprotrude out through said case...- Aperture 76-is formed at 77, as

seen in Fig. 5, to permit the supp0rt`15 to' freely oscillate as beforedescribed, and

-member 21' fits'l`0osely vinto the aperture`76v to substantially.inclose the operati-ng mecha# nism from the exterior. This form ofcasing may have a guard 78 attached to its sidesas shown in Figs. 4ands@ .which'guard-upasses about the thermostatic members 2 1 and 22,y.f

protecting them from injury,"and stillallows currents of air to pass upand'down through itsopenends7 9 and'80 to actuate thejdevice,

and may .also have a thermometer 81 attached to its exterior. L A l.Theadvantages of my invention are mani-v fest. Placing the thermostaticmembers in a plane parallel t0 the backl reduces the space occupied bythe'device. The 'arrangement of the contact members permits of easy7 ad]ustment of the same. 'The number of parts and theirconstruction renderVthe de- 'vice less expensively constructed and insures more positiveaction.

I claimt.

l..A thermostat comprising a back, an arm formed near the center of saidback and spaced therefrom, a thermostatic member secured to said arm,` apointer pivoted between said arm and said back, a support -formed on theupper portion of said back extending outward beyond the planeof saidthermostatic member, a bell crank pivoted to said support having one armengaging the center of the outer surface of said thermostatic member andthe other arm extending at right angles thereto along said support, anda link connecting said bell crank and said pointer and extending betweenthe arm and thermostatic member and said back for operating the pointer.I

v porting member pivotally secured to said Aso back, a thermostaticmember fixed on said supporting member, a pointer pivoted upon saidsupporting member and actuated by said thermostatic member, contactmembersv fixed upon said back and engaged by said pointer, a leverslidably pivoted to said back,

a notched segment, a head on said lever en-l pointer, a lever foroscillating said supporting member, means for automatically oscillatingsaid lever, and anadjustable stop for limiting said oscillation.

4. A thermostat ,comprising a back, a supporting member pivotallysecured to said back, a thermostatic member fixed on said supportingmember, a pointer pivoted upon said supporting memberandv actuated bysaid thermostatic member, ,contact members fixed upon said back andengaged by said pointer, a lever slidably pivoted to said back, anotched segment; a head on said lever engaging' said segment, a springfor causing said head to engage said segment'and for oscillating saidlever in one direction, means for automatically sliding said lever todisengage said head from said segment and release the lever, and anadjustably-positioned stop for limiting theoscillation of said lever.

2. A thermostat comprising a back, a sup- 5. A thermostat comprising afixed member, a supporting member rotatably mounted thereon, athermostatic member xed on said supporting member, a projecting memberattached kto said supporting member, a bellcrank pivoted to saidprojecting member having one arm thereof engaging the thermostatc memberand the other arm extending toward said supporting member, `a pointerpivoted to said supporting member, a link connecting said last mentionedarm and said pointer, contact members on said xed member engaged by saidpointer, a lever movably mounted on said fixed member, a pivotalconnection between said lever and said supporting member, means forholding said lever in a definite position, means tending to move saidlever in one direction, and means for automatically releasing said leverto permit it to move into another position. 1

6. A thermostat comprising a fixed member, a supporting member rotatablymounted thereon, a thermostatic member fixed on said supporting member,a pair of lugs attached to said supporting member extending beyond saidthermostatic member, a bell-crank pivoted to'said lugs having one armthereof engaging the n thermostatic member and the other armextendingtoward said supporting member, a pointer pivoted to said supportingmember, a link connecting said last mentioned armand saidpointer,contact members on said iixed member engaged by said pointer, alever slidably pivoted to said fixed member, a pivotal connectionbetween one end of sald lever and said supportlng member, anotched'segment secured to said fixed member, a head on the other end ofsaid lever` for 'engaging said segment, a spring for causing said headto enga ethe notches of said segment and for turning said lever in onedirection, a U-shaped lever pivoted to said fixed member having one legthereof engaging a projection on the slidable lever for sliding thesame, means associated with the other leg of said U-shaped lever forautomatically operating the same to release said slidable lever, andanadjustably positioned stop for limiting the movement of said slidl ablelever. i

In testimony whereof I ax my signature in presence of two Witnesses.

' v EVERETT H. WHITE. Witnesses:

F, A. WHiTELnY, H. A. BowMA'N.

